Paris Hilton and Nicole Richie have enjoyed the best moments of life together and they still do. It was bestie Nicole Richie's Birthday and Paris didn't refrain from expressing her deepest love for her buddy.

They are both billionaires and smart business women. Paris Hilton and Nicole Richie's camaraderie began right from birth, this is one reason why Paris splashed her social media pages with a special tribute for Nicole Richie who turned 36 years old on Thursday.

"Happy Birthday Nicole" she started, "Looking thru all these photos brings back so many special & amazing memories! Just wanted to let you know that I am so happy for & proud of you. Such a beautiful family you have created & loving your new TV show "Great News", so hilarious! I will always think of you as a sister & think of you often. Love & miss you," she gushes over a post on Twitter and Instagram

The gallery Paris shared on her official social media page had all the amazing memories captured including throwbacks of their younger days, celebrated moments of Halloween with fairy costumes and their transformation into reality stars at later stages.

Hilton and Richie have had earlier co-starred in the reality show "The Simple Life". Both have been together through thick and thin since childhood, but their friendship fell apart in 2005, with Hilton telling people Richie "knows what she did.". A year later, they were spotted at a dinner party and have been actively repairing their friendship since then, reported People magazine

Tags: Paris Hilton nicole richie Besties BFF Nicole Birthday